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| Unsteady flow of fractional Oldroyd-B fluid towards a stretched wedge |
| Received:October 23, 2021 Revised:March 21, 2022 |
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| DOI：10.7511/jslx20211023002 |
| KeyWord:unsteady flow fractional Oldroyd-B fluid porous medium thermal radiation finite difference method |
| Author | Institution |
| 白羽 |
北京建筑大学 理学院, 北京 ;建筑结构与环境修复功能材料北京市重点实验室, 北京 |
| 万飒 |
北京建筑大学 理学院, 北京 ;建筑结构与环境修复功能材料北京市重点实验室, 北京 |
| 张艳 |
北京建筑大学 理学院, 北京 ;建筑结构与环境修复功能材料北京市重点实验室, 北京 |
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| Abstract: |
| The unsteady stagnation point flow of fractional Oldroyd-B fluid through a stretched wedge in porous media is studied.Momentum equation is established based on the constitutive model of fractional Oldroyd-B fluid,in which the characteristics of buoyancy and stagnation point flow are introduced.The modified fractional Fourier's law considering thermal relaxation-retardation time is proposed,which applies in both the energy equation and the boundary conditions of convective heat transfer.The finite difference method integrated with L1-algorithm is utilized to address the governing fractional equations.The influence of various parameters on flow analyzed.The results show that the velocity rises with the increase of wedge angle parameter m and Darcy number.The temperature distribution first increases slightly but then declines significantly,which presents the thermal retardation characteristic of Oldroyd-B fluid. |